package com.sky.websocket;

import org.springframework.stereotype.Component;

import javax.websocket.OnClose;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

@Component
@ServerEndpoint("/ws/{sid}")
public class WebSocketServer {
    //存放会话对象
    private static Map<String, Session> sessionMap = new HashMap();

    /**
     * 连接建立成功调用的方法
     * @param session
     * @param sid
     */
    @OnOpen
    public  void onOpen(Session session,@PathParam ("sid")String sid) {
        System.out.println("客户端:"+sid +"建立连接");
        sessionMap.put(sid,session);
    }

    /**
     * 连接关闭调用的方法
     *
     * @param sid
     */
    @OnClose
     public void onClose(@PathParam("sid")String sid){
        System.out.println("连接断开:"+sid);
        sessionMap.remove(sid);
     }

    /**
     * 群发
     * @param message
     */
    public void sendToAllclient(String message){
        Collection<Session> sessions =
                sessionMap.values();
        for (Session session : sessions) {
            try{
                //服务器向客户端发送消息
                session.getBasicRemote().sendText(message);
            }catch (Exception e){
                e.printStackTrace();
            }
        }
     }
}
